BREAD: A DIET FOR USE IN THE McKENZIE BIOASSAY

in Journal of Endocrinology
Authors:
G. D. BROADHEAD
Search for other papers by G. D. BROADHEAD in
Current site
Google Scholar
PubMed
Close
,
S. M. DIRMIKIS
Search for other papers by S. M. DIRMIKIS in
Current site
Google Scholar
PubMed
Close
,
H. HUMPHRIES
Search for other papers by H. HUMPHRIES in
Current site
Google Scholar
PubMed
Close
,
S. K. JUSTICE
Search for other papers by S. K. JUSTICE in
Current site
Google Scholar
PubMed
Close
,
G. LOY
Search for other papers by G. LOY in
Current site
Google Scholar
PubMed
Close
, and
T. SMITH
Search for other papers by T. SMITH in
Current site
Google Scholar
PubMed
Close
Restricted access
Rent on DeepDyve

Sign up for journal news

Section of Pharmacology, Academic Division of Medicine and *Field Laboratories, The University, Sheffield, S102TN

(Received 8 July 1975)

The McKenzie (1958) bioassay remains the principal tool for studying the long-acting thyroid stimulator (LATS) and LATS-protector (LATSP), although radioreceptor binding assays are being developed (Manley, Bourke & Hawker, 1974; Smith & Hall, 1974). A dog biscuit met the low-iodine requirements until 1974, when batches contained sufficient iodine to make them unsuitable for use in this bioassay. Bread contains negligible iodine, unless iodated dough conditioner is added (London & Vought, 1965). Thus an investigation was made of the suitability of bread for use in the McKenzie bioassay.

Female, white Swiss mice were bred as described by Loy & Broadhead (1968), the colony being fed on pasteurized breeding diet (Oxoid Ltd). Mice were weaned at 4 weeks, fed on diet 86 (Oxoid Ltd) until body weights were 15–20 g (i.e. usually for 1–2 weeks),

 

  • Collapse
  • Expand